摘要
目的了解佳木斯市大气PM2.5中多环芳烃(PAHs)的污染特征。方法于2012年冬季连续2周采集了佳木斯郊区大气PM2.5样品,采用GC/MS定量分析了佳木斯市PM2.5中16种多环芳烃的含量。结果大气中PM2.5的质量浓度范围为55.63~120.72μg/m3,均值为74.80μg/m3;PAHs浓度范围是24.49~220.78 ng/m3,均值为102.82 ng/m3,多环芳烃中荧蒽、芘和菲等化合物相对含量较高,占多环芳烃总量的53.58%,利用化合物比值进行源解析,PM2.5中PAHs主要以燃煤为主,而非机动车排放;采用苯并(a)芘和苯并(a)芘等效质量浓度(BaPE)对佳木斯市大气颗粒物PM2.5中的PAHs进行致癌风险评价,BaP日均值为7.19 ng/m3,BaPE日均值为8.62 ng/m3,均超过了居民区标准限值(2.5 ng/m3),污染较为严重。结论佳木斯市大气PM2.5中多环芳烃主要来源于燃煤,BaP污染较为严重。
Objective To investigate pollution characteristics and health risk assessment of PM2.5 polycyclic aromatic hydrocarbons. Methods PM2.5 were collected consecutively for one week in winter in 2012 in suburb of Jiamusi. A total of 16 EPA priority PAHs were extracted by ultrasonic extraction method and were quantified using GC/MS. Results PM2.5 mass concentrations ranged 55.63-120.72 p^g/ms with an average of 74.80 p.g/m3, while PAHs mass concentrations ranged 24.49- 220.78 p,g/m3 with an average of 102.82 p.g/m3. The ratio analysis suggested coal-burning was the predominant sources for PAHs from PM2.5 in Jiamusi, not vehicle emission. PAHs profile was predominated by fluoranthene, pyrene and phenanthrene and the average contribution was 53.58%. Adopting benzo （a） pyrene （BaP） and benzo （a） pyrene-equivalent carcinogenic concentration （BaPE） to evaluate carcinogenic power of PAHs in PM2.5, the daily average concentration of BaP was 7.19 ng/m3 and the daily average concentration of BaPE was 8.62 ng/m3. The BaP and BaPE concentration were in excess of the regional standard （2.5 ng/m3）, the level was higher. Conclusions Coal-burning is the predominant source for PAHs from PM2.5 in Jiamusi and BaP concentration is higher.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2013年第9期794-796,共3页
Journal of Environment and Health
基金
黑龙江省教育厅科学技术研究项目(11551485)
佳木斯大学科学技术重点项目(Sz2011-012)
关键词
空气污染
PM2
5
多环芳烃
等效浓度
Air pollutioinl
PM2.5
Polycyclic aromatic hydrocarbons
Equivalent concentration
